Roller-mill



(No Model.) 4 Sheets-Sheet l.

J. A. MGANULTY.

ROLLER MILL.

No. 394,279. Patented Dec. 11, 1888.

4 SheetsSheet 2.

(No Model.)

J. A. MQANULTY,

ROLLER MILL.

atented Dec. 11, 1888.

amen 14m, o fi7z alto 0119 113 N. PEYERS. Phuw-umo mn Washinglon. D c.

1 Sheets-Sheet 3.

J. A. MQANULTY.

(No Model.)

ROLLER MILL.

Patented Dec. 11, 1888.

vvdmaowo,

fin atto'zmu s N. Prrtns. Phowiflhagnphnr. Wmhinglun. n. c,

(No Model.) 4 Sheets-Sheet 4.

J. A. MOANULTY.

ROLLER MILL.

No. 394,279. Patented Dec. 11, 1888.

WM W UNITED STATES PATENT OFFICE.

JOHN A. MCANULTY, OF MINNEAPOLIS, MINNESOTA.

ROLLER- MILL.

SPECIFICATION forming part of Letters Patent No. 394,279, dated December 11, 1888.

Application filed February 11, 1888. Serial No. 263,752. (No model) To all whom it may concern:

Be it known that I, J OHN A. MCANULTY, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Roller-Mills; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Myii'ivention relates to roller-mills; and the objects thereof are, first, to provide improved mechanism for evenly feeding the stock or material to be crushed or ground to the rolls; second, improved means for holding the outer rolls in positive grinding position or fixed relation with respect to the inner rolls and at the same time permitting them to yield in case any hard foreign substance passes between and causes undue strain upon them; third, novel means for spreading the rolls, which enables me by the use of a single lever and the parts operated thereby to spread or throw out of grinding relation either or both pairs of rolls of a double or four roller mill; fourthly, improved means for supporting and adjusting the movable roll; fifth, improved means for driving the rolls, whereby I am enabled to drive all ['our of the rolls of a double-roller mill by means of a single belt.

My invention consists in the construction and arrangement or combination of parts hereinafter disclosed in the description, drawings, and claims.

In the accompanying drawings, forming part of this specification, wherein the same reference-numerals indicate the same parts, Figure 1 represents a side elevation of a rollermill embodying my invention; Fig. 2, a longitudinal vertical section of a portion of the same, more particularly showing my improved 'fEBdll'lg' mechanism; Fig. 33, a transverse vertical section of the same; Fig. l, a partlybroken horizontal section, more particularly showing the mechanism for supporting and spreading the outer or movable rolls; Figs. 5, o, T, 8, and 9, details, which are hereinafter described; and Fig. 10, a perspective detail view of the pivoted and adjustable valve.

I11 the drawings, 1 represents the body or easing of the mill, the inner rolls, 2, being firmly journaled in the upper portion thereof,

the outer rolls, 3, being inovably supported adjacent thereto, and above these rolls and the casing the feeding mechanism is arranged in the usual manner.

A suitable hopper, 4, forming part of the feeding mechanism, receives the material or stock to be treated through a suitable spout, i. A valve, 5, is pivoted ilmnediately below said spout upon a pintle or pivot, l", which is supported upon the partition 6, which separates the hopper into two compartments, 0. Two wings, 5, which are provided with plates 5 upon their outer edges, are pivot-ed at their lower ends upon a shaft or bolt, 5" as shown in Figs. 2 and 10, which passes through andis supported by the lower end of the valve 5. These wings, with their plates, are adapted to be moved or rocked upon said bolt over both sides of said valve; also, said valve may be turned upon its pivot to bring its upper edge in a line with the axis of the spout, as shown in Fig. 3; also, the wings 5 may be moved or adjusted so as to incline in the same direction on the opposite sides of said valve, and thus direct all of the stock into one hopper-compartment; also, they may be adjusted to incline in opposite directions, so that equal or unequal parts of stock may be delivered into both compartments, according to their adj ustment. The wing shown in full lines in :2 is adjusted for directing one half of the stock into the compartment on the right, while the wing shown in dotted lines in same figure is adjusted for directing the other half of the stock into the compartment on the left. (See also Fig. 10.)

Each compartment of the hopper is provided with a yielding gate or bot-tom, T, which is pivoted upon adjustable arms attached to a vibratory frame, 8, which extends outside of and above the lower ends of the hoppercompartments (3. Tlhese adjustable arms are not shown in the drawings, asl make no claim thereto herein, the same forming part of an invention for which I applied for Letters Patent November 24, 1884, Serial No. llSJ-i-fl.

Each of the gates is provided with an arm or rod, 9, extending out beyond its pivotal points and receiving a movable weight, 9, for holding said gate with a yielding pressure against the bottom of the hopper and regulating the flow of material therefrom. The upper surfaces of these gates are serrated or grooved, the abrupt faces of said grooves preferably facing toward the inner or discharge sides of the gates. Over the outer sides and ends of the gates and the bot- 5 toms of the hopper-compartments are secured strips 10, 0f yielding or flexible material, which prevents the stock from escaping only at the inner sides of the gates.

The shaker-frame 8, to which the gates 7 1 o are pivoted, is suspended by yielding or spring hangers 7 attached to the stationary frame, and is vibrated by the following means: An eccentric shaft, 11, is passed through the walls of the hopper and supported in bearings outside thereof, as more plainly shown in Fig. 3, the eccentrics being arranged thereon intermediate of said bearin and the hopper-walls. Connecting with the eccentrics, which may be either formed by reducing the shaft or in any other suitable manner, are boxes 11, form ed wit-h diametrically-opposite recesses 11, as shown in Figs. 8 and 9. To these boxes are secured pitmen 12, which have their inner ends or heads curved, so as 2 5 to pass more than half around said boxes, and are provided on their inner sides with lugs or points 12, which fit in the lower recesses in the boxes, and in their extreme inner ends they are provided with screx threaded holes, through which pass setscrews 12", having thereon binding-nuts 12". This construction results in rocking or half-gimbal joints between the eccentrics and pitmen, permitting of lateral play of the latter and pre- 3 5 Venting uneven wear. The curved outer ends of the pitmen are attached to the shakerframe by universal couplings 13, as shown in Figs. 2 and 3, which, in connection with the peculiar attachment of the inner ends or heads of said pitmen to the eccentrics, will permit said pitmen to move sidewise without bending should the line of their vibration be not exactly at right angles to the eccentricshaft, as shown in dotted lines in Fig. 7. This eccentric-shaft is driven by means of a belt passing over a pulley thereon and over a pulley on one of the roll-shafts in the same manner in which feed rolls are ordinarily driven in roller-mills.

5o Directly over the outer ends of the arms or rods 9, and secured to cross-bars 14: at the ends of the shaker-frame, are placed adjustable stops l l, for determining the distance to which the gates may yield, and thereby regu- 5 5 lating the feed from the hopper. The stock may be made to pass directly from the hopper-gates 7 to the rolls or pass over the riffleboards 15, which will spread it out evenly and remove any uneven places that may be in the sheets, and it may also pass over the stationary inclined shelves 16, which will cause it to pass to the rolls with an even flow.

As the hopper is stationary and the hopper gates or bottoms vibrate thereunder, the stock resting upon said gates will be carried or pushed forward and fed over their inner or discharge sides with each vibration of the shaker-frame substantially in the manner in which sawdust is forced ahead of a saw in sawing wood.

The main frame, body, or casing of the mill, upon which the already-described feeder rests, is preferably made of one casting, and the two inner rolls, 2, are mounted in fixed bearings formed in said casing. This casing is provided with one or more brackets, 17, near the lower part of each of its ends and is formed with transverse openings above said brackets which extend from side to side of said casing. A shoe or framesection, 1.8, of corresponding size to each of said openings and adapted to cover and close the same, is also provided with one or more brackets, 18, arranged in ertical alignment with those, 1.7, on the casing and mounted thereon by adjustable universal couplings of the construction shown in Figs. 1 and 6. The brackets 17 and 18' of these adjustable couplings are, as stated, in vertical alignment, the latter bracket, 18', resting .upon a round-headed screwbolt, 17', which passes through a slot, 17", in the former bracket, 17, and rests with its point upon the lower branch of a yoke, 17', which extends up over the bracket] 8 and secured thereto by a screw-bolt, 18. The screw-bolt 17' is held in its vertical adjustments by a nut, 18 f, thereon resting beneath the lower bracket, 17. Lateral an d combined lateral and vertical adjustments of the brackets 18 and the shoes or frame-sections 18, to which they are attached, can be effected by changing the positions of the screws 18, which bear against the screw-bolts 17 and by vertically ad j ustin g the latter.

The upper parts of the shoes or frame-sections 18 are provided with fixed bearings for the outer rolls, 3, which are journaled therein in the same manner as the inn er rolls are journaled in the casing. These frame-sections overlap the edges of the main frame or casing, as shown in Fig. 4 and in dotted lines in Fig. 1, thereby preventing sidewise movement of said sections at their upper ends; but their lower ends are adapted to be moved sidewise by the adjusting-screws 18", as shown in Fig. 6, so as to tram or adjust the outer rolls to the inner ones.

The outer rolls are held in proper grinding position with respect to the inner rolls by means of yokes 19, which are connected at their outer ends with the journals of said rolls and at their inner ends with an eccentric shaft, 20, which is journaled in the upper part of the casing and extends across the same. This shaft is provided with a hand-lever, 21, by which it may be turned upon its axis, and it is also provided with a series of cams or eccentrics, 22, so arranged that when the handlever is thrown in either direction-say at an angle of about sixty degrees to a horizontal line through the axis of the shaftthe eccentrics will be turned in the openings 19 at the inner ends of the yokes and move one set of the rolls out of contact, and when thrown to another anglesay one of thirty degreesboth sets of rolls will. be out of contact. The arrai'igement of the cams or eccentrics is such that the set of rolls toward which the lever turns is the one which is first separated or spread by the movement of the lever.

The yokes it), by which the outer or movable rolls areheld in. grinding position, are of the form more plainly shown in Fig. 5, and have their lower and upper members or arms, 1!) and 19, constructed of suitable spring metal. The lower members or arms are provided with upturned ends lfl', which, under the ordinary pressure of the rolls, engage shoulders 23 near the outer ends of the upper arms of said yokes, and thereby hold the outer rolls positively in grinding position; but in case a foreign substance that is too hard to be crushed be passed between the rolls of either pair they will spread apart, when the upturned ends will be released from the shoulders 23 and forced outward until they engage with second shoulders, 24, which will thus allow the outer rolls to yield sufficiently from the fixed rolls to permit the foreign substance to pass without injuring them.

The yokes l?) are provided near their central parts with stirrups 25, which pass around them, and are provided with adjusting-screws so, which bear upon the tops of the upper arms of the yoke. 13y operating these screws any amount of tension required in the arms or members of the yokes may be obtained.

To provide for varying the grinding adjustment or proximity of the rolls, I attach the shoes or fraime-sections 19, in which the movable rolls arejournaled, to the outer ends of the yokes l!) in the 'l'ollowing manner: lircularstuds or projections 37 are formed upon or secured to the sides of the upper ends of each shoe or frame-section, and upon these levers 28 are mounted, which are formed with holes 28', in which said studs lTbear. These levers are forked at their lower ends, extend on both sides of the lower arms, of the yokes, and are attached to adjlisting-screws 29 by means of. the collars 2!), between which the forked ends of said levers rest.

The adjustingscrews 2!) are fitted into threaded openings of lugs 230, formed on the lower arms of the yokes, and are provided with hand-whwls 31, by which they are operated. The upper ends of the levers 28 are fulcru med upon studs 32, which are secured to the upturned ends lEJ of the yokes by setscrews 33. lly turning the hand-wheels ill the levers 2% are moved forward or backward, swinging on their pivots or studs 32, and carry with them the shoes or frame-sections lb and the outer rolls, 2 journaled therein. Hence any required adjustment between the two rolls of a pair can thus be obtained.

I provide the following devices for driving the rolls of a double-roller mill by a single driving-belt, said belt being preferably arranged in the following manner: Each roll is provided with a driviug pulley, all of them being arranged on the same side of the mill. A counter-shaft, 34, provided with a drivingpulley, 35, is arranged below the mill; also, an adjustable lever, 36, carrying an idler or tightener pulley, 37, is arranged below the mill, but above said cmmter-slmit. Two other idler-pullevs, 33 and 339, are mounted upon swiveled yokes 40, so that they may be turned at an angle to the planeof the pulleys of the rolls. The idler-pulleys 3S and 539 are secured upon the .fioor or upon the base of the mill, as may be found most convenient.

The driving-belt ll passes from the drivingpulley 35 on the (punter-shaft first over the driving-pulley 42 on one of the outer rolls, El, thence down and around the idler-pulley Etl, thence up and over the pulley 43 of one of the inner rolls, 2, thence down beneath the mill and, under the adjustable tightener-pulley 37, thence up and around the driving-pulley 44. on the outer roll, 3, of. the other set of rolls, thence down and around the idler-pulley 38 at the base of the frame, thence up and around the pulley 45 on the other inner roll, 2, and thence down to the driving-pulley 335 on the counter-shaft.

By the constructimi and arrangmnent ol' the parts just described I am enabled to drive all the rolls of a double-roller mill from a single counter-shaft by means of a single belt pass ing over pulleys at one side of the mill upon the shafts of all the rolls; also, as is obvious, I may duplicate the belt and pulleys named. and arrange them at the opposite side of the mill, as is often desirable or necessary as tending to lessen the driving-pmver required and to hold both emlsotthe roll-shafts [irmly or properly in their bearings.

llaving thus fully described the construction, arrangement, and operation of the several parts of my invention, what I claim as new isl. A roller-mill-feeding mechanism comprising the hopper 4-, having the compartments (3, the yielding gates T, the valve 5, and the pivoted wings 5, adapted to be adjusted upon the sides of said valve. for directingthe How of stock to either or both of said compartments, substantially as described.

In a roller-mill-feeding mechanism, the combination, with the inlet-spout r and the hopper 4, having the compartments U, of the valve 5, located between said compartments and spout, the adjustable wings 5, secured upon opposite sides of said valve, and the pivotal bolt or shaft 5', substant ially as described.

53. In a roller-mill-leeding mechanism, the combination of a hopper, a suspended frame provided with a pivoted yieltling feed-gate, and devices for vibrating said frame and gate, consisting of an eccentric-shaft and pit-men connected at their inner ends thereto by halfgimbal or laterally-rocking joints and connected at their outer ends to said frame, substantially as described.

4. In a ro ler-mill-feeding mechanism, the combination of a hopper, a suspended frame provided with a pivoted yielding feed-gate, and devices for vibrating said frame and gate, consisting of an eccentric-shaft and pitmen connected thereto at their inner ends by halfgimbal or laterallyrocking joints and connected at their outer ends to said frame by universal couplings, substantially as described.

5. In a roller-mill, the combination of a frame or casing formed with transverse openings extending across its ends and fixed or non-adjustable rolls supported upon said casing, with adjustable shoes or frame-sections arranged and adapted to cover or close said openings, and movable rolls mounted upon said shoes or frame-sections, substantially as described.

6. In a roller-mill, the combination of a frame or casing formed with transverse openings extending across its ends and fixed or non-adjustable rolls supported upon said casing,with shoes or framesections arranged and adapted to cover or close said openings, devices arranged at the lower ends of said framesections for adjusting them laterally and vertically, and movable rolls mounted in fixed bearings in the upper ends of said frame-sections, substantially as described.

'7. In a roller-mill, the combination of a frame or casing formed with transverse openings extending across its ends and fixed or non-adj ustable rolls supported upon said casing, with shoes or frame-sections arranged and adapted to cover or close said openings, the brackets 17 and 18', the yokes 17', the roundheaded screw-bolts 17', the nut 18, the screws 13, and the movable rolls mounted in the upper ends of the frame-sea tions, substantially as described.

8. In a roller-mill, the combination of the casing 1, formed with transverse openings extending across its ends, and fixed rolls 2, mounted upon said casing, with shoes or frame-sections 13, covering said openings and carrying the movable rolls 3, the yokes 19, secured at their outer ends to said shoes, the cam or eccentric shaft passing through the inner ends of said yokes, and a hand-lever foroperating'tlie'saiiie to'move the movable rolls into or out of grinding relation with the fixed rolls, substantially asdescribed.

9. In a roller-mill, the combination of the casing 1, formed with transverse openings extending across its ends, and fixed rolls 2, mounted upon said casing,with shoes or framesections 18, covering said openings and carrying the movable rolls 3, the yokes 19, adj ustably secured at their outer ends to said shoes,. the cam or eccentric shaft passing through the inner ends of said yokes, and a hand-lever for operating the -same to move the movable rolls into or out of grinding relation with the fixed rolls, substantially as described.

10. In a roller-mill, the combination of the casing 1, formed with transverse openings extending across its ends, and fixed rolls 2, mounted upon said casingmith shoes orframesections 18, covering said openings and carrying the movable rolls 3, the yokes 19, the levers 28, attached to the shoes or frame-sections and yokes, the adj usting-screws 29, and the hand-wheels 31, substantially as described.

11. In a roller-mill, the combination, with a movable roll, of yokes suitably supported at their inner ends and formed with upper and lower arms or members constructed of spring metal, the upper members being formed with shoulders and the lower members with up turned ends adapted to engage with and be released from said shoulders, substantially as and for the purpose described.

12. In a roller-mill, the combination, with a movable roll, of yokes suitably supported at their inner ends and formed with upper and lower arms or members constructed of spring metal, the upper members being formed with shoulders and the lower members with upturned ends adapted to engage with and be released from said shoulders, and the adjustable stirrups for binding together said upper and lower members and adjusting their springtension, substantially as described.

13. In a roller-mill, the combination of the fixed rolls 2 and movable rolls 3 with the cam or eccentric shaft 20, the yokes 19, mounted at their inner ends upon said shaft and connected at their outer ends with said movable rolls and formed with upper and lower arms or members made of spring metal, the upper members being provided with shoulders 23 and 24 and the lower members with upturned ends 19", and the adjustable stirrups 25, for

binding together said upper and lower members and adjusting their spring-tension, substantially as described.

14. In a belt-drive for a four-roller mill, the combination of the roll-pulleys 42, 4.3, 44, and 15, the swiveled idler-pulleys 38 and 39, the adjustable tightener-pulley 37, the countershaft pulley 35, and the single continuous open belt 41, which passes first from pulley 35 over pulley 412, driving the outer roll of one set inward, then beneath the swiveled idlerpulley 39, then over pulley 43, driving the in-' ner roll of said set inward, then downward and beneath the adjustable tightener-pulley 37, then upward and over the pulley 44,(.l1i" ing the outer roll of the opposite set inward,

then downward and beneath the swiveled idler-pulley 33, then upward and over the pulley -15, driving the inner roll of this set i11- ward, and thence downward back to and below the counter-shaft pulley 35, substantially as described.

In testimony whereof I aifix my signature in presence of two witnesses.

JOHN A. MCANULTY. \Vitnesses:

F. M. GREEN, \V. F. SPERRY. 

